Flushing valve



April 12, 1932 w; F. SCHULTHEISS FLUSHING VALVE Filed 001:. 4, 1930 Ill/717, 14

INVENTOR fi lu/mv fie/1a; 7715/55 BY M l ,1 TTOANE x5 Patented Apr. 12,1932

UNITED STATES WILLIAM F. SCHULTHEISS, OF LOS ANGELES, CALIFORNIA FLUSHING VALVE Application filed ctober4, 1930. Serial No. 486,447.

This invention relates to a flush valve structure adapted for affording a timed or volumetric flow of water supplied by a water system, and is especially useful in flushing toilet bowls. This invention pertains to a flush valve adapted to be set in operation by momentary actuation of a release member such as a handle so as to unseat a relief valve and cause a control valve to be opened by pressure of the liquid supply and to remain open a predetermined time. The period of opening is controlled by a by-pass.

It has been found that, if the liquid supply pressure becomes negative and the outlet from the flush valve is submerged, water from the bowl will be educed and pass into the service supply lines. In the case of toilet and closet bowls, which are flushed by water supplied from the service mains, sewage and contaminated water may be drawn into the service lines with resultant unsanitary effects. Negative pressure occurs at times when a large supply of water is being drawn from the service system. To present invention re- 2 lates to auxiliary means in the flush valve preventing eduction of water or liquid from the receptacle to be flushed.

These objects together with other objects and corresponding accomplishments are ob- 30 tained by means of the embodiment of my in-- vvention illustrated in the accompanying drawings, in which Fig. 1 is a sectional view showing the flush valve in normal or closed position; Fig. 2 is 5 a similar sectional view as seen on the line 2-2 of Fig. 1; Fig. 3 is a perspective view showing a closet bowl and flushing valveinstallation; and Fig. 4 is a section as seen on the line 44 of Fig. 2.

Referring particularly to Fig. 3, a closet bowl is denoted by 5 and is provided with a hinged cover 6. The flushing valve is marked 7.

Referring to the flush valve, a casing 8 has 45 an inlet 9 for connection to the house service piping and an outlet 10 for the delivery of flushing water to the bowl 5. In the bore of the casing a piston chamber 11 is formed. At the juncture of the inlet9 and outlet 10 is an annular rib web with a rib 12 for seat ing thereon of the main valve dividing the casing into an inlet chamber and an outlet chamber. A piston body 13 is adapted to be reciprocated within the piston chamber 11, it being formed with a piston end 14 and a. valve r3 end 15 cooperating with the seat 12. A bore 16 extends through the piston body to form a relief valve port.

' The relief valve is of the tilting type having a disk 17 and a stern depending through C3 the bore '16. This stem comprises an alining portion 18 including radial ribs 19 tapering toward the lower end and provided with a threaded pin to which is secured a hollow or tubular section 20. A stop pin 21 extends C3 above the relief valve and is adapted to engage the cap 22 onthe casing. The lower end of the tubular section is beaded inwardly, and disposed in the bore of the tubular section is a plunger 23 adapted to have asliding movement therein. 'The lower end of the plunger 23 projects beyond the section and provides an operating portion of the relief valve. The stem is thus formed of sections such that it is collapsible.

The valve is operated by means of a longitudinally' extending rod 24 normally held in retracted position by a compression spring 25 engaging a collar 26. A handle 27 is mounted so as to be movable'in any direction, tilting of the handle causing the head 28 to engage the collar 26, push the rod 24 inwardly, engage and the relief-valve stem as shown, thereby unseating valve disk 17.

A boss 29 is formed on the casing between l the displacement or piston chamber 11 and the inlet 9 and is provided with a by-pass serving for,communication of the chamber. This passage way comprises a port section 30 and a duct 31 with an intermediate regulating pin and cleaning device 32.

In the position shown in Figs. 1 and 2, the piston is atthe lower end of its travel with the main valve 33 seated over a port 34 in web 12, and the control valve seated. The displacement chamber above the piston 14 is filled with water under pressure from the inlet side of the flush valve and is trapped therein. Upon tilting the handle 27, the relief valve will be tilted. This places the m3 displacement chamber in communication with the outlet 10 and the pressure on the lower side of the piston 14 being greater than that on upper side, causes the piston to travel upwardly. The travel is quick and raises the main valve 33 off its seat 12. \Vater then rushes from the inlet 9 into the outlet 10 and to the bowl. Water under pressure from the service piping passes into the displacement chamber at a slow rate, moving the piston downwardly and-causing seating of the valve.

The relief valve may seat, even though the rod 23 is held in its inner position below the relief valve stem. This results from the collapsion of the relief valve stem. Thus, it is impossible to hold the relief valve off its seat;

A specific type of flush valve has been shown, but the details form no part of the present invention which resides in an auxiliary means connected to the inlet chamber.

Before describing the details of the auxiliary means, an action of the flush valve without such means will be described. In Fig. 3 a top inlet bowl is shown. It will be noted that the flush valve 7 is disposed above the bowl 5 and therefore above the water level in the bowl. If a negative pressure is developed on the inlet side 9 of the flush valve, which may be occasioned by a fire hydrant in the service mains being opened or by reason of any large momentary withdrawal of water, an eduction effect will be produced by way of by-pass 30 through the clearance between the stem of pin 32 and port 30, ribs 33 supporting the pin head so as not to close the by-pass. Water is then withdrawn from the displacement chamber above piston 14, relief valve 17 is lifted from its seat and siphoning of water from the closet bowl 5 into the service piping occurs if the outlet pipe 10a is submerged. If at this time the handle 27 is manipulated, the opening of the relief valve is aided and the bowl contents are quickly siphoned into the house service system. .In the case of a side inlet bowl, the outlet pipe 10a is submerged. In a top inlet or back inlet bowl Where the flush inlet in the bowl is above, the water level therein, stoppage of the waste line from the bowl and filling of the bowl will produce a potential siphoning condition.

To the end that such a withdrawal of water from the bowl may be prevented, the casing 8 of the flush valve is provided with a raised rib 34 and aboss 35. Apassage 36 leads from the inlet chamber to the bore of boss 35.

This provides a break forany siphon which rubber plug 39 serve as a seat cover bumper as'best illustrated in Fig. 3.

What I claim is 1. A flush valve comprising a casing having an inlet chamber, a displacement chamber, an outlet chamber, an inlet for flushing liquid under pressure, an outlet for delivery of flushing liquid to a fixture, a valve port for communication of said inlet and outlet chambers; a reciprocable displacement member in said displacement chamber, a main valve for control of said port operable by said displacement member, said displacement member being acted upon by pressure of flushing liquid from the inlet tending to maintain said valve in position closing said port; relief means normally closed and adapted to be opened to connect said displacement chamber to said outlet; manually operable means to open said relief means; a by-pass disposedbetween the displacement chamber and said inlet to restore flushing liquid under pressure to said displacement chamber; a passage in the wall of said casing for placing the outlet in communication with the atmosphere, saidv casing having a boss into which the outlet of said passage opens, and a cap having a seat cover bumper mounted on said boss.

2. A flush valve comprising a casing having an inlet chamber, a displacement chamber, an outlet-chamber, an inlet for flushing.

liquid under pressure, an outlet for delivery of flushing liquid to a fixture, a Web between said inlet and outlet chambers having a valve port for communication-thereof; a reciprocable displacement member in said displacement chamber, a main valve on and below said displacement member for. said port, said displacement member being acted upon by pressure of flushing liquid from the inlet tending to maintain said valve in position closing said port; relief means normally closed and adapted to connect said displacement chamber to said outlet; manually oper- ,able meansZto open said relief means; a bypass disposed between the displacement chamber and said inlet to restore flushing liquid under pressure to said displacement chamber; and a passage in the wall of said casing-placing the outlet in communication with the atmosphere, said casing having a' boss into which the outlet of said passage opens, and a cap having a seat cover bumper mounted on said boss.

In witness that I claim the foregoing I have hereunto subscribed my name this 20th day of September, 1930.

WILLIAM F. SCHULTHEISS. 

